21414516 has 48 divisors (see below), whose sum is σ = 52276224. Its totient is φ = 6816096.

The previous prime is 21414461. The next prime is 21414529. The reversal of 21414516 is 61541412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23811 + ... + 24693.

It is an arithmetic number, because the mean of its divisors is an integer number (1089088).

Almost surely, 2^21414516 is an apocalyptic number.

It is an amenable number.

21414516 is an abundant number, since it is smaller than the sum of its proper divisors (30861708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21414516 is a wasteful number, since it uses less digits than its factorization.

21414516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 978 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 21414516 is about 4627.5820900336. The cubic root of 21414516 is about 277.6958701557.

Adding to 21414516 its reverse (61541412), we get a palindrome (82955928).

The spelling of 21414516 in words is "twenty-one million, four hundred fourteen thousand, five hundred sixteen".